Germany based Hartge has released the figures on its ECU software tune for the M5 and M6 good for 642hp and 810 Nm (597 lb-ft), representing an increase of +82 hp and +130 Nm (96 lb-ft) over the factory figures.

Hartge quotes a new 0-62mph time of 4.2 seconds with a top speed of 190mph (305kmh).

This is achieved with the ECU tune as well as a stainless steel exhaust system.

The Hartge F10 M5 below also showcases Hartge lowering springs which lowers the M5 by 25mm front / 20mm rear, as well as the Hartge front lip (still unpainted in some photos) and carbon fiber mirror covers.